Greetings all;

The new encoder wheel I made last night, by fiddling with the math that
determines the slot width until it has virtually no side wobble of the
1/16" mill at the inner apex of the slot, makes me ask a question about
what is the best way to chemically blacken brass, hopefully with the
intention of preventing reflections from the sides of the cut in the brass
that might artificially broaden the effective aperture of the slot.

So, how does one chemically blacken brass?

Ideally something that destroys any and all surface gloss, leaving a dead
flat microscopic felt like finish.

I considered paint, but at those angles of reflectance, even black paint
might as well be glossy white. Plus I don't have any other than some ebony
wood stain. ;-)

Cheers, Gene
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
My web page: <http://coyoteden.dyndns-free.com:85/gene>
The trouble with you
Is the trouble with me.
Got two good eyes
But we still don't see.
-- Robert Hunter, "Workingman's Dead"

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